1. soak in some medium till saturated.   Hint First letter clue   2. conclude or deduce.   First letter clue   3. make valid or confirm.   First letter clue   4. harden into bone or become rigid.   First letter clue   5. hinder or prevent.   First letter clue   6. lay down as basis or truth.   First letter clue   7. split into two opposite groups.   First letter clue